pixie: name binary pixie and allow macOS build

- Pixie supports macOS. Nix package should too.
- Updated executable name as discussed in pixie-lang/pixie/issues/455.

closes #33771

pkgs/development/interpreters/pixie/dust.nix

@@ -30,6 +30,6 @@ stdenv.mkDerivation rec {
     description = "Provides tooling around pixie, e.g. a nicer repl, running tests and fetching dependencies";
     homepage = src.meta.homepage;
     license = stdenv.lib.licenses.lgpl3;
-    platforms = stdenv.lib.platforms.linux;
+    platforms = stdenv.lib.platforms.linux ++ stdenv.lib.platforms.darwin;
   };
 }